10686825172021 has 2 divisors, whose sum is σ = 10686825172022. Its totient is φ = 10686825172020.

The previous prime is 10686825172007. The next prime is 10686825172159. The reversal of 10686825172021 is 12027152868601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6349140062500 + 4337685109521 = 2519750^2 + 2082711^2 .

It is a cyclic number.

It is not a de Polignac number, because 10686825172021 - 2¹¹ = 10686825169973 is a prime.

It is a super-2 number, since 2×10686825172021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10686825173021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343412586010 + 5343412586011.

It is an arithmetic number, because the mean of its divisors is an integer number (5343412586011).

Almost surely, 2^{10686825172021} is an apocalyptic number.

It is an amenable number.

10686825172021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10686825172021 is an equidigital number, since it uses as much as digits as its factorization.

10686825172021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 10686825172021 in words is "ten trillion, six hundred eighty-six billion, eight hundred twenty-five million, one hundred seventy-two thousand, twenty-one".